diff --git a/edosl0util/rdrgen.py b/edosl0util/rdrgen.py
index 040001a68e0ae921c910e12fdb761c3fc4d0cbe1..64596a0cc7ae54ca9f7a5d1bfbd4a3b9cd97890a 100644
--- a/edosl0util/rdrgen.py
+++ b/edosl0util/rdrgen.py
@@ -349,7 +349,7 @@ class RdrWriter(object):
             self._h5_file,
             {
                 "Distributor": distributor,
-                "Mission_Name": missions[self.sat],
+                "Mission_Name": missions[self._sat],
                 "N_Dataset_Source": origin,
                 "N_HDF_Creation_Date": self._format_date_attr(self._creation_time),
                 "N_HDF_Creation_Time": self._format_time_attr(self._creation_time),